Flutter child widget refreshing parent widget - how to not do this - flutter

Question

When the class members of child class PartnerInviter are changed inside the child class, somehow it changes the state of the parent class as well which is PartnerConnect. isInviteOption: true, isInviteSent: false => Parent widget resets the flag to false, false. I thing build of PartnerConnect is getting called. How do I fix this?
Parent widget is:
class PartnerConnect extends StatefulWidget{
bool isInviter = true;
#override
State<StatefulWidget> createState() {
return PartnerConnectState();
}
}
class PartnerConnectState extends State<PartnerConnect>{
final _scaffoldKey = GlobalKey<ScaffoldState>();
double card_elevation = 1;
TextEditingController phoneNumber = TextEditingController();
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
key: _scaffoldKey,
body: widget.isInviter ? PartnerInviter(
isInviteOption: false,
isInviteSent: false,
scaffoldKey: _scaffoldKey,
) : PartnerInvitee(
isInvitationAccepted: true,
inviterNumber: '9********0',
scaffoldKey: _scaffoldKey),
appBar: AppBar(
title: Text('Partner Connect'),
backgroundColor: Colors.white,
elevation: 0.0,
),
backgroundColor: Colors.white,
),
);
}
}
Child widget is:
class PartnerInviter extends StatefulWidget{
bool isInviteOption = false;
bool isInviteSent = false;
GlobalKey<ScaffoldState> scaffoldKey;
PartnerInviter({this.isInviteOption, this.isInviteSent, this.scaffoldKey});
#override
State<StatefulWidget> createState() {
return _PartnerInviterState();
}
}
class _PartnerInviterState extends State<PartnerInviter> {
double card_elevation = 1;
TextEditingController phoneNumber = TextEditingController();
#override
Widget build(BuildContext context) {
return inviterConnectBody();
}
Widget inviterConnectBody(){
return Container(
margin: EdgeInsets.all(MediaQuery.of(context).size.width*0.1),
child: ListView(
children: <Widget>[
Visibility(
child: numberInputWidget(),
visible: widget.isInviteOption,
replacement: Container(
child: Visibility(
child: RequestReceivedWidget(phoneNum: phoneNumber.value.text),
visible: widget.isInviteSent,
replacement: Container(
child: RequestRevokeWidget(phoneNum: phoneNumber.value.text),
),
),
),
)
],
),
);
}
Widget RequestRevokeWidget({String phoneNum}){
return Card(
elevation: card_elevation,
color: Colors.deepPurple[50],
child: Container(
height: MediaQuery.of(context).size.height * 0.3,
child: ListView(
children: <Widget>[
ListTile(
title: Text('Partner connected'),
subtitle: Text('Registered number: ${phoneNum}'),
),
Center(
child: Container(
margin: EdgeInsets.only(left: MediaQuery.of(context).size.width * 0.04, right: MediaQuery.of(context).size.width * 0.04),
child: RaisedButton(
color: Colors.deepPurple,
child: Padding(
padding: EdgeInsets.only(bottom: 5),
child: Text('Revoke access', style: TextStyle(color: Colors.white),),),
onPressed: (){
setState(() {
widget.isInviteOption = true;
SnackBar snackBar = SnackBar(content: Text('Partness access successfully revoked'),);
widget.scaffoldKey.currentState.showSnackBar(snackBar);
});
},
),
)),
],
),
),);
}
Widget RequestReceivedWidget({String phoneNum}){
return Card(
elevation: card_elevation,
color: Colors.deepPurple[50],
child: Container(
height: MediaQuery.of(context).size.height * 0.3,
child: ListTile(
title: Text('Waiting for partner to accept invite'),
subtitle: Text('Registered number: ${phoneNum}'),
),
),)
;
}
Widget numberInputWidget(){
final buttonMargin = MediaQuery.of(context).size.width * 0.038;
return Card(
elevation: card_elevation,
color: Colors.deepPurple[50],
child: Container(
height: MediaQuery.of(context).size.height * 0.3,
child: ListView(
children: <Widget>[
ListTile(
title: Text('Partner'),
subtitle: Text('Enter the phone number'),
),
Center(
child: Container(
margin: EdgeInsets.only(left: MediaQuery.of(context).size.width * 0.04, right: MediaQuery.of(context).size.width * 0.04),
child: TextField(
controller: phoneNumber,
keyboardType: TextInputType.number,
enabled: true,
maxLength: 10,
maxLengthEnforced: true,
decoration: InputDecoration(
prefixText: '+91-',
contentPadding: EdgeInsets.only(left: 5.0, bottom: 5.0),
),
),
)),
Padding(
padding: EdgeInsets.only(
bottom: MediaQuery.of(context).viewInsets.bottom)),
Container(
margin: EdgeInsets.only(left: buttonMargin, right: buttonMargin),
child: RaisedButton(
color: Colors.deepPurple,
elevation: 0,
padding: EdgeInsets.only(bottom: 5.0),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10.0)),
child: Text(
"Confirm & Proceed",
style: TextStyle(
color: Colors.white,
fontFamily: "Nunito",
fontWeight: FontWeight.bold),
),
onPressed: () async {
RegExp regExp = new RegExp(r'(^[0-9]*$)');
if (phoneNumber.text.isEmpty) {
widget.scaffoldKey.currentState.showSnackBar(SnackBar(
content: Text("Please enter the mobile number")));
} else if (!regExp.hasMatch(phoneNumber.text) || phoneNumber.text.length < 10) {
widget.scaffoldKey.currentState.showSnackBar(SnackBar(
content: Text("Please enter valid mobile number")));
} else {
setState(() {
widget.isInviteOption = false;
widget.isInviteSent = true;
});
}
},
),
),
],
),
),)
;
}
}